Re: [RFC PATCH v3 0/2] fs: add AT_REPLACE flag for linkat()

[Omar Sandoval <osandov@osandov.com>]

On Fri, Apr 27, 2018 at 02:00:39PM +0200, Michael Kerrisk (man-pages) wrote:
> Hello Omar,
> 
> On 04/24/2018 08:19 AM, Omar Sandoval wrote:
> > From: Omar Sandoval <osandov@fb.com>
> > 
> > Hi, Al,
> > 
> > This is a respin of my linkat() AT_REPLACE series, previously posted
> > here:
> > 
> > https://patchwork.kernel.org/patch/9636735/
> > https://patchwork.kernel.org/patch/9636733/
> > 
> > There are no changes since v2, only a rebase onto v4.17-rc2 and some
> > minor additions to the commit messages.
> > 
> > The goal is to allow for updating a file atomically in-place with an
> > O_TMPFILE like so:
> > 
> > - open temporary file with O_TMPFILE
> > - write temporary file contents
> > - fsync temporary file
> > - atomically replace permanent location with the temporary file
> > - fsync parent directory
> 
> Could we have an example program with the next revision please,
> perhaps as part of the commit message?
> 
> And, please also some text suitable for inclusion in the linkat(2)
> manual page.
> 
> Thanks,
> 
> Michael

Yes, I'll do that.